Making Terrain From Cardboard

Although this video is focused on Warhammer 40K, I think the techniques shown for building terrain entirely out of cardboard are worth studying.

Making Tabletop Rivers

The LudStuff blog has a nice essay with photos on making tabletop rivers.

Poker Chip Terrain Bases

Carmen’s Fun Painty Time blog has a couple nice examples of terrain bases made from poker chips. He’s a very talented guy.

Making A Spiked Barrier – Palisade

Intructables has an article on making a “spiked barrier for a Rohan gaming table,” but this sort of palisade would be great for a huge variety of periods and scenarios.